(19)
(11) EP 0 559 469 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.02.1994 Bulletin 1994/07

(43) Date of publication A2:
08.09.1993 Bulletin 1993/36

(21) Application number: 93301653.7

(22) Date of filing: 04.03.1993
(51) International Patent Classification (IPC)5: G11B 11/10
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 06.03.1992 JP 83056/92
17.02.1993 JP 49939/93

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventor:
  • Ishii, Kazuyoshi, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo (JP)

(74) Representative: Beresford, Keith Denis Lewis et al
BERESFORD & Co. 2-5 Warwick Court High Holborn
London WC1R 5DJ
London WC1R 5DJ (GB)


(56) References cited: : 
   
       


    (54) Magnetic head driving device and magnetooptical recording apparatus


    (57) A magnetic field generation device generates a magnetic field modulated according to information signal by switching the direction of a current to be supplied to a magnetic field generation coil of a magnetic head, according to the information signal. The device is provided a magnetic field generation core, the magnetic field generation coil, an acceleration coil and a driving device. The magnetic field generation coil is wound around the magnetic field generation core. The acceleration coil is connected in parallel with the magnetic field generation coil to shorten a current inversion time upon generation of a magnetic field.






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